Engine and vehicle

Abstract

The invention relates to an engine and a vehicle, and relates to the technical field of engines. The engine comprises a cylinder cover, an air inlet piece and a first air inlet valve. By adjusting the opening degree, the opening time and the closing time of the first air inlet valve, the amount of air entering the combustion chamber can be accurately controlled, and therefore the combustion process, the power output and the fuel efficiency of the engine are affected. A plane perpendicular to the central axis of the first mounting hole is defined as a first reference plane, the first reference line is located on the first reference plane, the first reference line and the central axis of the first mounting hole intersect at a first central point, and the angle between the extending direction of the tangent line of the first reference line at the first central point and the first direction is set to be 42-44 degrees; thus, the airflow and the wall face of the air cylinder form a large tangential flowing speed, so that the air inlet vortex is formed, the high inflation efficiency is achieved, meanwhile, the proper vortex can be obtained, the flow coefficient and the vortex are balanced, and the fuel efficiency of an engine is improved.

Description

Technical Field

[0001] The present application relates to the field of engine technology, and in particular to an engine and a vehicle. Background Art

[0002] In order to obtain good power, economy and emission characteristics, the engine must have a sufficiently high airway flow coefficient and appropriate parameters such as intake swirl ratio and tumble ratio. Swirl helps improve the mixing of fuel and air and improve combustion quality, while a high flow coefficient can increase the intake volume, optimize the air-fuel ratio and reduce pumping losses. However, achieving a balance between the two is a challenge in engine design, which requires comprehensive consideration of multiple factors and optimized design. Summary of the invention

[0003] Based on this, the present application provides an engine and a vehicle, which can balance the swirl and flow coefficient of the engine.

[0004] According to one aspect of the present application, an embodiment of the present application provides an engine, comprising:

[0005] A cylinder head, wherein the cylinder head is provided with a combustion chamber for gas combustion and an air inlet communicated with the combustion chamber;

[0006] The air intake member comprises a first air intake portion and a second air intake portion; the first air intake portion has a first end connected to the cylinder head, the first end is provided with a first mounting hole arranged opposite to the air intake port and connected to each other, and the first air intake portion is provided with a first air flow channel connected to the air intake port; and

[0007] A first intake valve, comprising a first part and a second part connected to each other, the first part being located in the combustion chamber, the second part extending out of the first intake portion through the intake port and the first mounting hole, the first air flow channel being connected to the combustion chamber through the first connecting portion, the maximum lift position of the first intake valve being located above the first connecting portion, and a gap being formed between the first part and an inner surface of the first connecting portion when the first part of the first intake valve passes through the first connecting portion;

[0008] The first airflow channel is configured to extend along a first reference line, the first reference line is configured to be a line with continuous curvature, and the inner wall of the first airflow channel is configured to guide the airflow in the first airflow channel to flow along the extension path of the first airflow channel;

[0009] A plane perpendicular to the central axis of the first mounting hole is defined as a first reference plane, and a first reference line is located on the first reference plane, and the first reference line intersects with the central axis of the first mounting hole at a first center point; an extension direction of a tangent of the first reference line at the first center point has an angle of 42 to 44 degrees with the first direction.

[0010] In one embodiment, the air intake member further comprises a second air intake portion spaced apart from the first air intake portion along the first direction, the second air intake portion having a second end connected to the cylinder head, a second mounting hole disposed opposite to the air intake port and communicating with each other is disposed on the second end, and a second air flow channel communicating with the air intake port is disposed in the second air intake portion;

[0011] The engine further includes a second intake valve, the second intake valve includes a third part and a fourth part connected to each other, the third part is located in the combustion chamber, the fourth part extends out of the first intake part through the intake port and the mounting hole, the second air flow channel is connected to the combustion chamber through the second connecting part, the maximum lift position of the second intake valve is located above the second connecting part, and when the third part of the second intake valve passes through the second connecting part, there is a gap between the inner surface of the third part and the second connecting part;

[0012] The second airflow channel is configured to extend along a second reference line, the second reference line is configured as a line with continuous curvature, and the inner wall of the second airflow channel is configured to guide the airflow in the second airflow channel to flow along the extension path of the second airflow channel;

[0013] A plane perpendicular to the central axis of the second mounting hole is defined as a second reference plane, and a second reference line is located on the second reference plane, and the second reference line and the central axis of the second mounting hole are compared to the second center point; an extension direction of a tangent of the second reference line at the second center point has an angle of 68 to 70 degrees with the first direction; the first reference plane and the second reference plane are parallel.

[0014] In one embodiment, along the extension direction of the first air inlet portion, the first air inlet portion has a third end disposed opposite to the first end; along the extension direction of the second air inlet portion, the second air inlet portion has a fourth end disposed opposite to the second end;

[0015] The engine further includes a connecting member connected between the second end and the fourth end, the connecting member having a connecting passage connecting the first airflow passage and the second airflow passage;

[0016] The orthographic projections of the side walls of the first air inlet and the second air inlet facing each other on the first reference plane are respectively the first projection line and the second projection line; the side wall of the connecting member on the first reference plane is the connecting line; the end points of the first projection line and the second projection line close to each other are connected by means of the connecting line;

[0017] The connecting line is located on the first reference circle, and the center of the first reference circle is located on a side of the connecting line close to the first air inlet portion and the second air inlet portion.

[0018] In one embodiment, the first projection line is located on the second reference circle, and the center of the second reference circle is located on the side of the first projection line close to the second air inlet; the second reference circle and the first reference circle are tangent to the end point where the first projection line and the connecting line are connected; the radius of the first reference circle is R1, the radius of the second reference circle is R2, and R1 and R2 satisfy: R2 / R1=2.87-2.88; and / or

[0019] The second projection line is located on the third reference circle, and the center of the third reference circle is on the side of the second projection line close to the first air inlet; the third reference circle and the first reference circle are tangent to the end points where the second projection line and the connecting line are connected; the radius of the first reference circle is R1, and the radius of the third reference circle is R3, and R1 and R3 satisfy: R3 / R1=7.03-7.04.

[0020] In one embodiment, the first reference line includes a first arc segment and a second arc segment that are smoothly connected to each other, and an end point of the second arc segment away from the first arc segment coincides with the first center point; the first arc segment is located on a fourth reference circle, and the second arc segment is located on a fifth reference circle, and the center of the fourth reference circle and the center of the fifth reference circle are both located on a side of the first reference line close to the second air inlet portion;

[0021] The radius of the first reference circle is R1, the radius of the fourth reference circle is R4, and R1 and R4 satisfy: R4 / R1=3.88-3.89; and / or

[0022] The radius of the first reference circle is R1, the radius of the fifth reference circle is R5, and R1 and R5 satisfy: R5 / R1=7.22-7.23.

[0023] In one embodiment, the second reference line includes a third arc segment and a fourth arc segment that are smoothly connected to each other, the third arc segment is far away from the end point of the fourth arc segment and is close to the connecting member, the third arc segment is located on a sixth reference circle, the fourth arc segment is located on a seventh reference circle, the center of the sixth reference circle is located on a side of the second reference line away from the first air inlet portion, and the center of the seventh reference circle is located on a side of the second reference line close to the first air inlet portion;

[0024] The radius of the first reference circle is R1, the radius of the sixth reference circle is R6, and R1 and R6 satisfy: R6: R1 = 9.27-9.28; and / or

[0025] The radius of the first reference circle is R1, the radius of the seventh reference circle is R7, and R1 and R7 satisfy: R7: R1=5.93-5.94.

[0026] In one embodiment, the second air flow channel is configured as a tangential air channel; and / or

[0027] The surface roughness of the wall surface of the second air inlet portion is less than 0.1.

[0028] In one embodiment, the length of the first air inlet portion along the extension path of the first air inlet portion is less than the length of the second air inlet portion along the extension path of the second air inlet portion; the second air flow channel is configured to extend along a second reference line, the second reference line is configured as a line with continuous curvature, and the curvature of the first reference line is greater than the curvature of the second reference line.

[0029] In one embodiment, the first airflow channel is configured as a tangential airway; and / or

[0030] The surface roughness of the wall surface of the first air inlet portion is less than 0.1.

[0031] According to another aspect of the present application, an embodiment of the present application provides a vehicle, comprising the engine in any of the above embodiments.

[0032] The engine and vehicle described above include a cylinder head, an intake member and a first intake valve. The cylinder head is provided with a combustion chamber for gas combustion and an intake port connected to the combustion chamber. The intake member includes a first intake portion, the first intake portion has a first airflow channel, and the first airflow channel is connected to the intake port, so that the first airflow channel is connected to the combustion chamber to transmit air to the combustion chamber of the cylinder head. By adjusting the opening, opening time and closing time of the first intake valve, the amount of air entering the combustion chamber can be accurately controlled, thereby affecting the combustion process, power output and fuel efficiency of the engine. A plane perpendicular to the central axis of the first mounting hole is defined as a first reference plane, and a first reference line is located on the first reference plane. The first reference line intersects the central axis of the first mounting hole at a first center point, and an extension direction of a tangent of the first reference line at the first center point is set to an angle of 42 to 44 degrees with the first direction. In this way, a greater tangential flow velocity is formed between the airflow and the cylinder wall, thereby forming an intake vortex, achieving high charging efficiency while obtaining appropriate vortex, balancing the flow coefficient and vortex, and helping to improve the fuel efficiency of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the partial structure of the engine in some embodiments of the present application.

[0034] Figure 2 for Figure 1 Schematic diagram of a top view of part of the structure of the engine.

[0035] Figure 3 for Figure 1 Another schematic top view of the partial structure of the engine in FIG.

[0036] Figure 4 for Figure 1 Another top view schematic diagram of the partial structure of the engine in.

[0037] Figure 5 for Figure 1 Another schematic top view of part of the structure of the engine in FIG.

[0038] The reference numerals in the specific implementation manner are as follows:

[0039] 1. Cylinder head, 11. Combustion chamber, 21. First intake part, 22. Second intake part, X1. First reference line, HD1. First arc segment, HD2. Second arc segment, X2. Second reference line, HD3. Third arc segment, HD4. Fourth arc segment, D1. First center point, D2. Second center point, Q1. First intake valve, Q2. Second intake valve, 3. Connector, T1. First projection line, T2. Second projection line, L1. Connector, Y1. First reference line Reference circle, Y2, second reference circle, Y3, third reference circle, Y4, fourth reference circle, Y5, fifth reference circle, Y6, sixth reference circle, Y7, seventh reference circle, QD1, first air flow channel, QD2, second air flow channel, θ1, angle between the extension direction of the first reference line X1 at the first center point D1 and the first direction F1, θ2, angle between the extension direction of the second reference line X2 at the second center point D2 and the first direction F1, F1, first direction. DETAILED DESCRIPTION

[0040] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0041] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0042] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If present, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like as used in this application are for illustrative purposes only and do not represent the only implementation method.

[0046] See also Figure 1 , Figure 1 The partial structural schematic diagram of the engine in some embodiments of the present application is shown. The engine provided in one embodiment of the present application includes a cylinder head 1 and an intake member. The cylinder head 1 is provided with a combustion chamber 11 for gas combustion and an intake port connected to the combustion chamber 11.

[0047] The combustion chamber 11 is where the fuel and air are mixed and burned. In the combustion chamber 11, after the fuel and air are mixed, they are ignited by a spark plug or compression self-ignition to produce high-temperature and high-pressure combustion gas. These combustion gases push the piston to move, thereby converting chemical energy into mechanical energy to drive the engine to operate. The intake part is a part of the engine intake system. Its main function is to guide air or a mixture of air and fuel from the external environment into the combustion chamber 11 of the engine.

[0048] Continue reading Figure 1 In conjunction with Figure 2 , Figure 2 for Figure 1 A schematic top view of a partial structure of the engine in FIG. The air intake member includes a first air intake portion 21, the first air intake portion 21 has a first end connected to the cylinder head, the first end is provided with a first mounting hole arranged opposite to the air intake port and connected to each other, and a first air flow channel QD1 connected to the air intake port is provided in the first air intake portion 21. The first air flow channel QD1 is configured to extend along a first reference line X1, the first reference line X1 is configured as a line with continuous curvature, and the inner wall of the first air flow channel QD1 is configured to guide the air flow in the first air flow channel QD1 to flow along the extension path of the first air flow channel QD1.

[0049] The first intake valve Q1 includes a first part and a second part connected to each other, the first part is located in the combustion chamber 11, the second part extends out of the first intake part 21 through the intake port and the first mounting hole, the first air flow channel QD1 is connected to the combustion chamber 11 through the first connection part, the maximum lift position of the first intake valve Q1 is located above the first connection part, and when the first part of the first intake valve Q1 passes through the first connection part, there is a gap between the first part and the inner surface of the first connection part. By adjusting the opening, opening time and closing time of the first intake valve Q1, the amount of air entering the combustion chamber 11 can be accurately controlled, thereby affecting the combustion process, power output and fuel efficiency of the engine.

[0050] Curvature continuity means that the curvature of a curve at a certain point is the same as the curvature at other points near that point, or changes smoothly according to a certain rule, without sudden changes or breakpoints.

[0051] A plane perpendicular to the central axis of the first mounting hole is defined as the first reference plane, and the first reference line X1 is located on the first reference plane, and the first reference line X1 intersects the central axis of the first mounting hole at the first central point D1; the extension direction of the tangent of the first reference line X1 at the first central point D1 has an angle of 42 to 44 degrees with the first direction F1, so that the airflow and the wall of the cylinder head 1 form a larger tangential flow velocity, thereby forming an intake vortex, achieving high charging efficiency while obtaining appropriate vortex, balancing the flow coefficient and vortex, and helping to improve the fuel efficiency of the engine.

[0052] In some embodiments of the present application, see Figure 1 and Figure 2 The air intake member further includes a second air intake portion 22 spaced apart from the first air intake portion 21 along the first direction F1. Compared with setting one air intake portion, setting the first air intake portion 21 and the second air intake portion 22 can increase the amount of air entering the engine, and the multiple air intake portions can be designed in different shapes and lengths to optimize the flow speed and pressure of the air and improve the air intake efficiency.

[0053] The second air intake portion 22 has a second end connected to the cylinder head 1, and a second mounting hole is provided on the second end, which is arranged opposite to the air intake port and communicated with each other. A second air flow channel QD2 communicated with the air intake port is provided in the second air intake portion 22;

[0054] The engine also includes a second intake valve Q2, which includes a third part and a fourth part connected to each other, the third part is located in the combustion chamber 11, and the fourth part extends out of the first intake part 21 through the intake port and the mounting hole, the second air flow channel QD2 is connected to the combustion chamber 11 through the second connection part, the maximum lift position of the second intake valve Q2 is located above the second connection part 22, and when the third part of the second intake valve Q2 passes through the second connection part 22, there is a gap between the third part and the inner surface of the second connection part 22. The second air flow channel QD2 is configured to extend along the second reference line X2, the second reference line X2 is configured as a line with continuous curvature, and the inner wall of the second air flow channel QD2 is configured to guide the air flow in the second air flow channel QD2 to flow along the extension path of the second air flow channel QD2. The plane perpendicular to the central axis of the second mounting hole is defined as the second reference plane, and the second reference line X2 is located on the second reference plane, and the second reference line X2 and the central axis of the second mounting hole are compared with the second central point D2; the extension direction of the tangent of the second reference line X2 at the second central point D2 is 68 degrees to 70 degrees with the first direction F1; the first reference plane and the second reference plane are parallel. The extension path of the second airflow channel QD2 is designed so that the airflow forms a larger tangential flow velocity with the wall of the cylinder head 1, thereby forming an intake vortex, achieving high charging efficiency while obtaining an appropriate vortex, balancing the flow coefficient and the vortex, and is conducive to improving the fuel efficiency of the engine. The first reference plane and the second reference plane are arranged in parallel, which means that the central axes of the first mounting hole and the second mounting hole are also parallel to each other. The first mounting hole and the second mounting hole that are parallel to each other enable the first intake valve Q1 and the second intake valve Q2 to be aligned after installation, which is conducive to achieving synchronous movement of the intake valves in the same direction.

[0055] In some embodiments of the present application, continue to refer to Figure 1 and Figure 2, along the extension direction of the first air inlet portion 21, the first air inlet portion 21 has a third end disposed opposite to the first end; along the extension direction of the second air inlet portion 22, the second air inlet portion 22 has a fourth end disposed opposite to the second end;

[0056] The engine further includes a connecting member 3, which is connected between the second end and the fourth end, and has a connecting passage connecting the first airflow passage QD1 and the second airflow passage 1D2. In this way, air can be transmitted from the connecting member 3 to the first air intake portion 21, and then to the combustion chamber 11. One of the two opposite ends of the second air intake portion 22 along the extension direction of the second air intake portion 22 is connected to the connecting member 3, and the other end is connected to the combustion chamber 11. Similarly, air can also be transmitted from the connecting member 3 to the second air intake portion 22, and then to the combustion chamber 11.

[0057] The orthographic projections of the side walls of the first air inlet 21 and the second air inlet 22 facing each other on the first reference plane are the first projection line T1 and the second projection line T2 respectively. The side wall of the connecting member 3 on the first reference plane is the connecting line L1; the end points of the first projection line T1 and the second projection line T2 close to each other are connected by means of the connecting line L1;

[0058] The connecting line L1 is located on the first reference circle Y1 , and the center of the first reference circle Y1 is located on a side of the connecting line L1 close to the first air inlet portion 21 and the second air inlet portion 22 .

[0059] Specifically in this application, please refer to Figure 2 The length of the first air intake portion 21 is smaller than that of the second air intake portion 22. The longer second air intake portion 22 can directly introduce more air into the combustion chamber 11, and the shorter first air intake portion 21 can be used to form more vortices.

[0060] In some embodiments of the present application, continue to refer to Figure 2 , and combined with reference Figure 3 , Figure 3 Shows Figure 1Another schematic top view of the partial structure of the engine in FIG. The first projection line T1 is located on the second reference circle Y2, and the center of the second reference circle Y2 is located on the side of the first projection line T1 close to the second air intake portion 22; the second reference circle Y2 and the first reference circle Y1 are tangent to the end point where the first projection line T1 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, and the radius of the second reference circle Y2 is R2, and R1 and R2 satisfy: R2: R1 = 2.87-2.88; and / or, the second projection line T2 is located on the third reference circle Y3, and the center of the third reference circle Y3 is located on the side of the second projection line T2 close to the first air intake portion 21; the third reference circle Y3 and the first reference circle Y1 are tangent to the end point where the second projection line T2 and the connecting line L1 are connected, the radius of the first reference circle Y1 is R1, and the radius of the third reference circle Y3 is R3, and R1 and R3 satisfy: R3: R1 = 7.03-7.04.

[0061] In the case where "the first projection line T1 is located on the second reference circle Y2, the center of the second reference circle Y2 is located on the side of the first projection line T1 close to the second air intake portion 22; the second reference circle Y2 and the first reference circle Y1 are tangent to the end point where the first projection line T1 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, the radius of the second reference circle Y2 is R2, and R1 and R2 satisfy: R2: R1 = 2.87-2.88", in the design of the air intake part, the larger the radius R2 of the second reference circle Y2 is designed to be, the smoother the first projection line T1 is, so that the airflow can enter the combustion chamber 11 faster, improve the intake efficiency and thus improve the flow coefficient, and the larger the radius R2 is designed to be, the less vortex will be caused. Therefore, in order to have both suitable vortex and a higher flow coefficient, R2 cannot be designed to be too large or too small. The applicant found that when the value of R2: R1 is in the range of 2.87-2.88, it can have both suitable vortex and a higher flow coefficient. Among them, the "flow coefficient" is used to describe the flow capacity of fluid through valves, pipes or other fluid control equipment, and is an important parameter for measuring the performance of fluid control equipment.

[0062] In the case where "the second projection line T2 is located on the third reference circle Y3, the center of the third reference circle Y3 is located on the side of the second projection line T2 close to the first air intake portion 21; the third reference circle Y3 and the first reference circle Y1 are tangent at the endpoints where the second projection line T2 and the connecting line L1 are connected, the radius of the first reference circle Y1 is R1, the radius of the third reference circle Y3 is R3, and R1 and R3 satisfy: R3: R1=7.03-7.04", the second air intake portion 22 is longer than the first air intake portion 21, and its main function is to quickly guide the airflow into the combustion chamber 11, so the second projection line T2 is designed to be smoother to reduce the energy loss of the airflow during the flow process. The applicant found that when the value of R3: R1 is in the range of 7.03-7.04, it can have both suitable swirl and a higher flow coefficient.

[0063] In addition, in the design of the first projection line T1 , the second projection line T2 and the connecting line L1 , the interval between the first projection line T1 and the second projection line T2 gradually decreases.

[0064] The above-mentioned “the first projection line T1 is located on the second reference circle Y2, and the center of the second reference circle Y2 is located on the side of the first projection line T1 close to the second air inlet portion 22; the second reference circle Y2 and the first reference circle Y1 are tangent to the end point where the first projection line T1 and the connecting line L1 are connected. The radius of the first reference circle Y1 is R1, and the radius of the second reference circle Y2 is R2, and R1 and R2 satisfy: R2: R1=2.87-2.88” and “the second projection line T2 is located on the third reference circle Y3, and the center of the third reference circle Y3 is located on the side of the second projection line T2 close to the first air inlet portion 21; the third reference circle Y3 and the first reference circle Y1 are tangent to the end point where the second projection line T2 and the connecting line L1 are connected, the radius of the first reference circle Y1 is R1, and the radius of the third reference circle Y3 is R3, and R1 and R3 satisfy: R3: R1=7.03-7.04” can be arbitrarily combined and set according to actual conditions.

[0065] In some embodiments of the present application, continue to refer to Figure 2 and Figure 3 , and combined with reference Figure 4 , Figure 4 Shows Figure 1Another top view schematic diagram of the partial structure of the engine in. The first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other, and the end point of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1; the first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5, and the center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake portion 22, wherein the radius of the first reference circle Y1 is R1, the radius of the fourth reference circle Y4 is R4, and R1 and R4 satisfy: R4: R1=3.88-3.89; and / or, the radius of the first reference circle Y1 is R1, the radius of the fifth reference circle Y5 is R5, and R1 and R5 satisfy: R5: R1=7.22-7.23.

[0066] In the case where "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other, the endpoint of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1; the first arc segment HD1 is located on the fourth reference circle Y4, the second arc segment HD2 is located on the fifth reference circle Y5, the center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake portion 22, wherein the radius of the first reference circle Y1 is R1, the radius of the fourth reference circle Y4 is R4, and R1 and R4 satisfy: R4:R1=3.88-3.89", the applicant found that when the value of R4:R1 is 3.88 to 3.89, a larger vortex can be quickly generated in the first air flow channel QD1.

[0067] In the case where "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 connected to each other, the endpoint of the second arc segment HD2 away from the first arc segment HD1 coincides with the first center point D1; the first arc segment HD1 is located on the fourth reference circle Y4, the second arc segment HD2 is located on the fifth reference circle Y5, the center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake portion 22, the radius of the first reference circle Y1 is R1, the radius of the fifth reference circle Y5 is R5, and R1 and R5 satisfy: R5:R1=7.22-7.23", the applicant found that when R5:R1 takes the value of 7.22-7.23, a larger vortex is generated after the airflow passes through the first arc segment HD1, which extends the flow path of the airflow, and then passes through the second arc segment HD2 to enter the combustion chamber 11 more quickly.

[0068] Here, “smooth connection” means that there is no abrupt transition at the connection between the first arc segment HD1 and the second arc segment HD2, but they are connected in a continuous and gradual manner, so that the curvature of the connection changes evenly without obvious corners or protrusions.

[0069] The above-mentioned "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 which are smoothly connected to each other, and the end point of the second arc segment HD2 is the first center point D1. The first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5. The center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air intake portion 22. The radius of the fourth reference circle Y4 is R4, and R1 and R4 satisfy: R4: R1=3.88-3.89" and "the first reference line X1 includes a first arc segment HD1 and a second arc segment HD2 which are smoothly connected to each other, and the end point of the second arc segment HD2 is the first center point D1. The first arc segment HD1 is located on the fourth reference circle Y4, and the second arc segment HD2 is located on the fifth reference circle Y5. The center of the fourth reference circle Y4 and the center of the fifth reference circle Y5 are both located on the side of the first reference line X1 close to the second air inlet 22. The radius of the fifth reference circle Y5 is R5, and R1 and R5 satisfy: R5: R1 = 7.22-7.23", which can be arbitrarily combined and set according to actual conditions.

[0070] In some embodiments of the present application, continue to refer to Figures 2 to 4 , and combined with reference Figure 5 , Figure 5 Shows Figure 1 Another schematic top view of the partial structure of the engine in FIG. The second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 that are smoothly connected to each other, the end point of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connector 3, the third arc segment HD3 is located on the sixth reference circle Y6, the fourth arc segment HD4 is located on the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake portion 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake portion 21, the radius of the first reference circle Y1 is R1, the radius of the sixth reference circle Y6 is R6, R1 and R6 satisfy: R6: R1 = 9.27-9.28; and / or, the radius of the first reference circle Y1 is R1, the radius of the seventh reference circle Y7 is R7, R1 and R7 satisfy: R7: R1 = 5.93-5.94.

[0071] In the case where “the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 which are smoothly connected to each other, the end point of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connecting piece 3, the third arc segment HD3 is located on the sixth reference circle Y6, the fourth arc segment HD4 is located on the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake portion 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake portion 21, the radius of the first reference circle Y1 is R1, the radius of the sixth reference circle Y6 is R6, and R1 and R6 satisfy: R6: R1=9.27-9.28”, the applicant found that by designing the third arc segment HD3 in this way, the curvature of the third arc segment HD3 is designed to be smaller, and the third arc segment HD3 is more linear, which can enable the vortex to enter the combustion chamber 11 more quickly.

[0072] In the case where "the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 which are smoothly connected to each other, the endpoint of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connecting piece 3, the third arc segment HD3 is located on the sixth reference circle Y6, the fourth arc segment HD4 is located on the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air intake portion 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air intake portion 21, the radius of the first reference circle Y1 is R1, the radius of the seventh reference circle Y7 is R7, and R1 and R7 satisfy: R7: R1=5.93-5.94", after the airflow flows rapidly along the third arc segment HD3, the centers of the third reference circle Y3 where the third arc segment HD3 is located and the fourth reference circle Y4 where the fourth arc segment HD4 is located are on different sides of the second reference line X2, so that the flow direction of the airflow tends to be straight and can be introduced into the combustion chamber 11.

[0073] The above-mentioned “the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 which are smoothly connected to each other, the end point of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connecting member 3, the third arc segment HD3 is located on the sixth reference circle Y6, the fourth arc segment HD4 is located on the seventh reference circle Y7, the center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air inlet portion 21, the center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air inlet portion 21, the radius of the first reference circle Y1 is R1, the radius of the sixth reference circle Y6 is R6, R1 and R6 satisfy: R6: R1=9.27-9.28” and “the second reference line X2 includes a third arc segment HD3 and a fourth arc segment HD4 which are smoothly connected to each other. The endpoint of the third arc segment HD3 away from the fourth arc segment HD4 is close to the connecting piece 3. The third arc segment HD3 is located on the sixth reference circle Y6, and the fourth arc segment HD4 is located on the seventh reference circle Y7. The center of the sixth reference circle Y6 is located on the side of the second reference line X2 away from the first air inlet portion 21. The center of the seventh reference circle Y7 is located on the side of the second reference line X2 close to the first air inlet portion 21. The radius of the first reference circle Y1 is R1, and the radius of the seventh reference circle Y7 is R7. R1 and R7 satisfy: R7: R1=5.93-5.94", which can be arbitrarily combined and set according to actual conditions.

[0074] In some embodiments of the present application, continue to refer to Figure 1 and Figure 2 , the second air flow channel QD2 is configured as a tangential air channel; and / or the surface roughness of the wall of the second air inlet portion 22 is less than 0.1.

[0075] When "the second air flow channel QD2 is constructed as a tangential air channel", the setting of the tangential air channel can cause the air flow entering the second air flow channel QD2 to produce a rotational motion, which helps to better mix the fuel and air and improve the combustion efficiency.

[0076] When "the surface roughness of the wall of the second air inlet portion 22 is less than 0.1", the smooth wall design can reduce the energy loss caused by the airflow encountering sharp parts, and the smooth wall reduces the friction between the airflow and the wall, thereby reducing the friction resistance and further improving the flow coefficient.

[0077] The above-mentioned “the second air flow channel QD2 is configured as a tangential air channel” and “the surface roughness of the wall surface of the second air inlet portion 22 is less than 0.1” can be arbitrarily combined according to actual conditions.

[0078] In some embodiments of the present application, continue to refer to Figure 1 and Figure 2, the length of the first air inlet portion 21 along the extension path of the first air inlet portion 21 is less than the length of the second air inlet portion 22 along the extension path of the second air inlet portion 22; the second air flow channel QD2 is constructed to extend along the second reference line X2, the second reference line X2 is constructed as a line with continuous curvature, and the curvature of the first reference line X1 is greater than the curvature of the second reference line X2.

[0079] The longer second air intake portion 22 can introduce more air directly into the combustion chamber 11, and the shorter first air intake portion 21 can be used to form more vortices, and the second reference line X2 is constructed as a line with continuous curvature. The curvature of the first reference line X1 is greater than the curvature of the second reference line X2, so that the air can have both suitable vortices and a higher flow coefficient during the process of being transported to the combustion chamber 11.

[0080] In some embodiments of the present application, the first air flow channel QD1 is configured as a tangential air channel; and / or the surface roughness of the wall surface of the first air inlet portion 21 is less than 0.1.

[0081] In the case where "the first air flow channel QD1 is constructed as a tangential air channel", similarly, the setting of the tangential air channel can cause the air flow entering the second air flow channel QD2 to produce a rotational motion, which helps to better mix the fuel and air and improve the combustion efficiency.

[0082] In the case where "the surface roughness of the wall of the first air inlet portion 21 is less than 0.1", similarly, the smooth wall design can reduce the energy loss caused by the airflow encountering sharp parts, and the smooth wall reduces the friction between the airflow and the wall, thereby reducing the friction resistance and further improving the flow coefficient.

[0083] The above-mentioned “the first air flow channel QD1 is configured as a tangential air channel” and “the surface roughness of the wall surface of the first air inlet portion 21 is less than 0.1” can be arbitrarily combined according to actual conditions.

[0084] According to some embodiments of the present application, an embodiment of the present application provides a vehicle, comprising the engine in any of the above embodiments.

[0085] In the technical solution of the embodiments of the present application, since the vehicle includes the engine in any of the above embodiments, it also has the advantages of any of the above embodiments.

[0086] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. An engine, characterized in that: include: A cylinder head, wherein the cylinder head is provided with a combustion chamber for gas combustion and an air inlet communicated with the combustion chamber; The air intake member comprises a first air intake portion; the first air intake portion has a first end connected to the cylinder head, the first end is provided with a first mounting hole arranged opposite to the air intake port and communicating with each other, and the first air intake portion is provided with a first air flow channel communicating with the air intake port; and A first intake valve, comprising a first part and a second part connected to each other, the first part being located in the combustion chamber, the second part extending out of the first intake portion via the intake port and the first mounting hole, the first air flow channel being connected to the combustion chamber via the first connecting portion, the maximum lift position of the first intake valve being located above the first connecting portion, and a gap being formed between the first part and an inner surface of the first connecting portion when the first part of the first intake valve passes through the first connecting portion; The first airflow channel is configured to extend along a first reference line, the first reference line is configured to be a line with continuous curvature, and the inner wall of the first airflow channel is configured to guide the airflow in the first airflow channel to flow along the extension path of the first airflow channel; A plane perpendicular to the central axis of the first mounting hole is defined as a first reference plane, and the first reference line is located on the first reference plane, and the first reference line intersects with the central axis of the first mounting hole at a first center point; an extension direction of a tangent of the first reference line at the first center point has an angle of 42 to 44 degrees with the first direction.

2. The engine according to claim 1, characterized in that The air intake member further includes a second air intake portion spaced apart from the first air intake portion along a first direction, the second air intake portion having a second end connected to the cylinder head, the second end being provided with a second mounting hole arranged opposite to the air intake port and communicating with each other, and the second air intake portion being provided with a second air flow channel communicating with the air intake port; The engine further comprises a second intake valve, the second intake valve comprises a third part and a fourth part connected to each other, the third part is located in the combustion chamber, the fourth part extends out of the first intake part via the intake port and the mounting hole, the second air flow channel is connected to the combustion chamber via the second connecting part, the maximum lift position of the second intake valve is located above the second connecting part, and when the third part of the second intake valve passes through the second connecting part, there is a gap between the third part and the inner surface of the second connecting part; The second airflow channel is configured to extend along a second reference line, the second reference line is configured as a line with continuous curvature, and the inner wall of the second airflow channel is configured to guide the airflow in the second airflow channel to flow along the extension path of the second airflow channel; A plane perpendicular to the central axis of the second mounting hole is defined as a second reference plane, and the second reference line is located on the second reference plane, and the second reference line and the central axis of the second mounting hole are compared to a second center point; an extension direction of a tangent of the second reference line at the second center point has an angle of 68 to 70 degrees with the first direction; the first reference plane and the second reference plane are parallel.

3. The engine according to claim 2, characterized in that Along the extension direction of the first air inlet portion, the first air inlet portion has a third end disposed opposite to the first end; along the extension direction of the second air inlet portion, the second air inlet portion has a fourth end disposed opposite to the second end; The engine further includes a connecting member connected between the second end and the fourth end, the connecting member having a connecting passage connecting the first airflow passage and the second airflow passage; The orthographic projections of the side walls of the first air inlet portion and the second air inlet portion facing each other on the first reference plane are respectively a first projection line and a second projection line; The side wall of the connecting member on the first reference plane is a connecting line; End points of the first projection line and the second projection line close to each other are connected by means of the connecting line; The connecting line is located on a first reference circle, and the center of the first reference circle is located on a side of the connecting line close to the first air inlet portion and the second air inlet portion.

4. The engine according to claim 3, characterized in that The first projection line is located on the second reference circle, and the center of the second reference circle is located on the side of the first projection line close to the second air inlet; the second reference circle and the first reference circle are tangent to the end point where the first projection line and the connecting line are connected; the radius of the first reference circle is R1, the radius of the second reference circle is R2, and R1 and R2 satisfy: R2 / R1=2.87-2.88; and / or The second projection line is located on the third reference circle, and the center of the third reference circle is on the side of the second projection line close to the first air intake portion; the third reference circle and the first reference circle are tangent to the end points where the second projection line and the connecting line are connected; the radius of the first reference circle is R1, and the radius of the third reference circle is R3, and R1 and R3 satisfy: R3 / R1=7.03-7.

04.

5. The engine according to claim 3, characterized in that The first reference line includes a first arc segment and a second arc segment that are smoothly connected to each other, and an end point of the second arc segment away from the first arc segment coincides with the first center point; the first arc segment is located on a fourth reference circle, and the second arc segment is located on a fifth reference circle, and the center of the fourth reference circle and the center of the fifth reference circle are both located on a side of the first reference line close to the second air inlet; The radius of the first reference circle is R1, the radius of the fourth reference circle is R4, and R1 and R4 satisfy: R4 / R1=3.88-3.89; and / or The radius of the first reference circle is R1, the radius of the fifth reference circle is R5, and R1 and R5 satisfy: R5 / R1=7.22-7.

23.

6. The engine according to claim 3, characterized in that The second reference line includes a third arc segment and a fourth arc segment which are smoothly connected to each other, the end point of the third arc segment away from the fourth arc segment is close to the connecting member, the third arc segment is located on a sixth reference circle, the fourth arc segment is located on a seventh reference circle, the center of the sixth reference circle is located on a side of the second reference line away from the first air inlet portion, and the center of the seventh reference circle is located on a side of the second reference line close to the first air inlet portion; The radius of the first reference circle is R1, the radius of the sixth reference circle is R6, and R1 and R6 satisfy: R6: R1=9.27-9.28; and / or The radius of the first reference circle is R1, the radius of the seventh reference circle is R7, and R1 and R7 satisfy: R7: R1=5.93-5.

94.

7. The engine according to any one of claims 2 to 6, characterized in that: The second air flow channel is configured as a tangential air channel; and / or The surface roughness of the wall surface of the second air inlet portion is less than 0.

1.

8. The engine according to any one of claims 2 to 6, characterized in that: The length of the first air inlet portion along the extension path of the first air inlet portion is less than the length of the second air inlet portion along the extension path of the second air inlet portion; the second air flow channel is configured to extend along a second reference line, the second reference line is configured to be a line with continuous curvature, and the curvature of the first reference line is greater than the curvature of the second reference line.

9. The engine according to any one of claims 1 to 6, characterized in that: The first airflow channel is configured as a tangential airway; and / or The surface roughness of the wall surface of the first air inlet portion is less than 0.

1.

10. A vehicle, characterized in that: Comprising an engine as claimed in any one of claims 1 to 9.

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